3781.109
Rest room facilities.

(A)
The board
of building standards shall adopt rules governing the number of water closets
required to be installed in women's and men's rest room facilities in buildings
or parts of buildings used for assembly purposes in accordance with the
standards specified under a national model plumbing code that is consistent
with rules adopted by the board pursuant to division (A) of section
3781.10 of the Revised Code.

(B)
For purposes of this section,
a building or part of a building is used for assembly purposes when the use of
the building or part of a building conforms to assembly usage as adopted by
rule under division (A) of section
3781.10 of the Revised Code.